Forum > Design Specific Boards > Tiki and Coastal Trek Designs > outboard cut out under load

outboard cut out under load

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Anonymous (not verified)
outboard cut out under load
hi - ihave a yamaha 8hp 2 stroke - she starts, idles and trawls fine but when I ask for half to full power she cuts out? The carb has been cleaned out, new plugs correctly gapped etc - any ideas? thanks johnny
Anonymous (not verified)
Re: outboard cut out under load
Is the exhaust port plugged with soot :?:
Anonymous (not verified)
Re: outboard cut out under load
Things to check: If you have an external tank, make sure the vent is fully open. The fuel line - an old bulb can cause problems. Choke is fully off. Did you check the fuel diaphragm for holes when you cleaned the carb?
Anonymous (not verified)
Re: outboard cut out under load
my old Johnson 9.9 did the same thing awhile back. I rebuilt the fuel pump and it was much better
Anonymous (not verified)
Re: outboard cut out under load
thanks everyone for input - exhaust is ok - i am going to replace bulb and take it from there!
Anonymous (not verified)
Re: outboard cut out under load
The ever increasing addition of ethynol in gasoline is causing problems with small motors. Make sure you use a fuel treatment for ethynol.